Opened 13 years ago

Closed 17 months ago

#498 closed enhancement (wontfix)

Proof-of-work for exit remailers

Reported by: tcr Owned by:
Priority: Low Milestone:
Component: Mixminion-Other Version: unspeficied
Severity: Normal Keywords:
Cc: tcr, nickm Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


To prevent spam and/or floods originating from the mixminion network it might be
sensible to require (adjustable by the exit remailer operator) some proof-of-work,
e.g. hashcash before relaying the message. Dummy messages would not be affected
because those don't leave the network anyway.

[Automatically added by flyspray2trac: Operating System: All]

Child Tickets

Change History (4)

comment:1 Changed 13 years ago by tcr

However, on second thought it could be tough to find a sensible value of
how much work to require. Users with low end software might not be able
to send anonymous messages in time.

comment:2 Changed 13 years ago by nickm

Right. See "'Proof-Of-Work' Proves Not To Work" by Ben Laurie and Richard Clayton at

for a similar observation.

comment:3 Changed 3 years ago by teor

Cc: tcr,nickmtcr, nickm
Severity: Normal

Set all open tickets without a severity to "Normal"

comment:4 Changed 17 months ago by nickm

Resolution: Nonewontfix
Status: newclosed

Mixminion development is not happening any more.

Note: See TracTickets for help on using tickets.